MODEL PREDICTION · 2026-09-21
● HARD

J. Ostapenko vs A. Zakharova — prediction

Seoul
OSTAPENKOWIN PROBABILITYZAKHAROVA
71%
model prob.
@1.57
odds · 64% impl.
⚔H2H 1–0 Ostapenko⏱Rest 19d vs 20d◐Hard 45%🎾Serve 59%📈Form 5/10 · 5✗
CONDITIONS OF THE MATCH◆ in the model◇ context
Surface◆
Hard

Consistent bounce, medium-fast: neutral conditions, no style favored.

Temperature◇
27°C

Warm: the ball flies a little more and fitness counts.

Humidity◇
41%

Dry air: the ball travels normally.

Wind◇
2 km/h

Light wind: no noticeable effect.

Surface feeds the model (surface specialization is one of its factors). Weather and altitude are context we publish for you — they do NOT move the probability.

OUR MODEL'S REASONING

›Ranking: #32 vs #109 (better ranked)

›Head-to-head: 1-0 in favor

›Model 71% vs market 64% → the model sees it as MORE likely than the odds

›Recent form: 5/10 in recent matches

WATCH FOR

!Coming off 5 losses in a row

Calibrated model probability (~64% out-of-sample accuracy, validated specifically on WTA). Not a guarantee: the model ≈ the market on average, so the odds already capture almost all the edge. 18+ · gamble responsibly.
@1.40
fair odds
+12.1%
expected value
BREAKDOWN · MODEL ANALYSIS

The model makes J. Ostapenko the favorite with a 71% win probability, against A. Zakharova's 29% — a solid favorite, though Zakharova keeps real chances. Converted to odds, that probability is worth about @1.40; the offered odds are around @1.57 (a 64% implied), slightly above the market, so the model is a touch more optimistic.

Several factors explain the number: #32 vs #109 (better ranked); 1-0 in favor; model 71% vs market 64% → the model sees it as more likely than the odds; 5/10 in recent matches.

Read it with perspective. Our probability is calibrated — when the model says 71%, that outcome happens roughly that percentage of the time, with ~64% out-of-sample accuracy — but being the favorite is not being the winner: roughly 29 out of every 100 times Zakharova wins. The model also tends to agree with the market, so the odds already capture almost all the edge: don't take it as a sure value. Watch out for: Coming off 5 losses in a row. This is informational analysis, not a betting recommendation. 18+ · play responsibly.

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